I made the decision to print in B&W (and print on demand) to keep the price down. I had spoke with a few publishers about full color and the price of the book would have been $80. I felt that would have priced the content out of reach for most people, particularly since the audience that prompted me to compile the book was a small group of college students who were always complaining (rightfully so) about the high cost of their text book. A full PDF of the book would difficult to protect from piracy, though I have plans for a Kindle version (when I can find time from my busy teaching schedule, so can't guarantee a time line). Am currently working on video tutorials which should be a better complement to the book than color photos.